Defogger fan for welding helmet



FIG. 1 is a top and left-side perspective view of a defogger fan for welding helmet showing our new design, the helmet shown in broken lines forms no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof. 

The ornamental design for a defogger fan for welding helmet, as shown and described. 